I have a friend who is twenty seven weeks pregnant shes done herione during the pregnancy and meth once what are the chances of these drugs showing up?

Wrong question. Forgive my frankness. If you're really her friend, you need to ask, "What can I do to help my friend stop doing these drugs, so that she can be a decent parent?" The BEST thing that can happen is that her drug abuse will be detected, Baby put someplace safe away from a drug-abusing mother, and your friend getting clean. I can't help her, but perhaps you can. Please give it a try. Best wishes.